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https://www.readbyqxmd.com/read/28882172/meta-analyses-of-the-proportion-of-japanese-encephalitis-virus-infection-in-vectors-and-vertebrate-hosts
#1
Ana R S Oliveira, Lee W Cohnstaedt, Erin Strathe, Luciana Etcheverry Hernández, D Scott McVey, José Piaggio, Natalia Cernicchiaro
BACKGROUND: Japanese encephalitis (JE) is a zoonosis in Southeast Asia vectored by mosquitoes infected with the Japanese encephalitis virus (JEV). Japanese encephalitis is considered an emerging exotic infectious disease with potential for introduction in currently JEV-free countries. Pigs and ardeid birds are reservoir hosts and play a major role on the transmission dynamics of the disease. The objective of the study was to quantitatively summarize the proportion of JEV infection in vectors and vertebrate hosts from data pertaining to observational studies obtained in a systematic review of the literature on vector and host competence for JEV, using meta-analyses...
September 7, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28876040/-secreted-expression-of-japanese-encephalitis-virus-prme-in-pichia-pastoris-and-immunogenicity-evaluation-of-the-virus-like-particles-in-mice
#2
Peng Zhao, Ya Jiang, Jingman Wang, Haojie Fan, Ruibing Cao
The study was to express prME protein of Japanese encephalitis virus (JEV) in Pichia pastoris and then to evaluate the immunological properties of the recombinant protein in mice, so as to explore a new way for subunit vaccine development of JEV. The JEV prME gene was amplified by RT-PCR with genome RNA of JEV vaccine strain SA14-14-2 and subcloned into pPICZa-A vector, designated as pPICZα-prME. pPICZα-SprME was constructed same as pPICZα-prME besides with the additional 19 Aa signal peptides coding gene of the JEV cap protein C terminal...
May 25, 2017: Sheng Wu Gong Cheng Xue Bao, Chinese Journal of Biotechnology
https://www.readbyqxmd.com/read/28869941/identifying-attenuating-mutations-tools-for-a-new-vaccine-design-against-flaviviruses
#3
Cécile Khou, Nathalie Pardigon
Emerging Flaviviruses pose an increasing threat to global human health. To date, human vaccines against yellow fever virus (YFV), Japanese encephalitis virus (JEV), dengue virus (DV), and tick-borne encephalitis virus (TBEV) exist. However, there is no human vaccine against other Flaviviruses such as Zika virus (ZIKV) and West Nile virus (WNV). In order to restrict their spread and to protect populations against the diseases they induce, vaccines against these emerging viruses must be designed. Obtaining new live attenuated Flavivirus vaccines using molecular biology methods is now possible...
September 5, 2017: Intervirology
https://www.readbyqxmd.com/read/28867626/enhanced-cytopathic-effect-of-japanese-encephalitis-virus-strain-sa14-14-2-probable-association-of-mutation-in-amino-acid-of-its-envelope-protein
#4
Barnali Nath, Ashutosh Gupta, Siraj A Khan, Sachin Kumar
Japanese encephalitis (JE) is a mosquito-borne viral disease. It is a global public health concern since it causes an acute encephalitis syndrome (AES). A large number of JE/AES cases are reported to occur in areas with established or developing JE vaccination program. Partial vaccine coverage and emergence of new variants of Japanese encephalitis virus (JEV) might be playing an important role. The envelope protein (E) of JEV is a major antigenic determinant and responsible for immunogenic responses as well as membrane fusion and virion assembly...
September 1, 2017: Microbial Pathogenesis
https://www.readbyqxmd.com/read/28865053/dc-sign-promotes-japanese-encephalitis-virus-transmission-from-dendritic-cells-to-t-cells-via-virological-synapses
#5
Ping Wang, Mei Li, Wei Lu, Di Zhang, Qinxue Hu, Yalan Liu
Skin-resident dendritic cells (DCs) likely encounter incoming viruses in the first place, and their migration to lymph nodes following virus capture may promote viral replication. However, the molecular mechanisms underlying these processes remain unclear. In the present study, we found that compared to cell-free viruses, DC-bound viruses showed enhanced capture of JEV by T cells. Additionally, JEV infection was increased by co-culturing DCs and T cells. Blocking the C-type lectin receptor DC-specific intercellular adhesion molecule-3-grabbing non-integrin (DC-SIGN) with neutralizing antibodies or antagonists blocked JEV transmission to T cells...
August 31, 2017: Virologica Sinica
https://www.readbyqxmd.com/read/28860941/dengue-virus-and-japanese-encephalitis-virus-infection-of-the-central-nervous-system-share-similar-profiles-of-cytokine-accumulation-in-cerebrospinal-fluid
#6
Haipeng Li, Yuanyuan Li, Bo Wen, Jian Zhang, Chengwu Wang, Zhanyi Song, Shuochi Li, Xiaowang Qu, Renbin Huang, Wenpei Liu
Dengue virus (DENV) and Japanese encephalitis virus (JEV) are two important pathogenic viruses that can cause severe encephalitis, which is accompanied by inflammatory cytokines. However, the inflammatory cytokine content of cerebrospinal fluid (CSF) in DENV and JEV infection of central nervous system are not sufficiently studied. To investigate cytokine levels in serum and CSF of hospitalised children with DENV and JEV infection of the central nervous system, a total of 183 hospitalised children with viral encephalitis-like syndrome were enrolled between May 2014 and April 2015 at the Children's Hospital of Chenzhou, Hunan, China...
2017: Central-European Journal of Immunology
https://www.readbyqxmd.com/read/28846635/regulation-of-apoptosis-during-flavivirus-infection
#7
REVIEW
Toru Okamoto, Tatsuya Suzuki, Shinji Kusakabe, Makoto Tokunaga, Junki Hirano, Yuka Miyata, Yoshiharu Matsuura
Apoptosis is a type of programmed cell death that regulates cellular homeostasis by removing damaged or unnecessary cells. Its importance in host defenses is highlighted by the observation that many viruses evade, obstruct, or subvert apoptosis, thereby blunting the host immune response. Infection with Flaviviruses such as Japanese encephalitis virus (JEV), Dengue virus (DENV) and West Nile virus (WNV) has been shown to activate several signaling pathways such as endoplasmic reticulum (ER)-stress and AKT/PI3K pathway, resulting in activation or suppression of apoptosis in virus-infected cells...
August 28, 2017: Viruses
https://www.readbyqxmd.com/read/28840803/isolation-and-full-genome-sequences-of-japanese-encephalitis-virus-genotype-i-strains-from-cambodian-human-patients-mosquitoes-and-pigs
#8
Veasna Duong, Rithy Choeung, Christopher Gorman, Denis Laurent, Yoann Crabol, Channa Mey, Borin Peng, Juliette Di Francesco, Vibol Hul, Heng Sothy, Ky Santy, Beat Richner, Jean-David Pommier, San Sorn, Véronique Chevalier, Philippe Buchy, Xavier de Lamballerie, Julien Cappelle, Paul Francis Horwood, Philippe Dussart
Japanese encephalitis remains the most important cause of viral encephalitis in humans in several southeast Asian countries, including Cambodia, causing at least 65 000 cases of encephalitis per year. This vector-borne viral zoonosis - caused by Japanese encephalitis virus (JEV) - is considered to be a rural disease and is transmitted by mosquitoes, with birds and pigs being the natural reservoirs, while humans are accidental hosts. In this study we report the first two JEV isolations in Cambodia from human encephalitis cases from two studies on the aetiology of central nervous system disease, conducted at the two major paediatric hospitals in the country...
September 2017: Journal of General Virology
https://www.readbyqxmd.com/read/28821775/atf3-negatively-regulates-cellular-antiviral-signaling-and-autophagy-in-the-absence-of-type-i-interferons
#9
Vikas Sood, Kiran Bala Sharma, Vishal Gupta, Dhurjhoti Saha, Parashar Dhapola, Manish Sharma, Utsav Sen, Shigetaka Kitajima, Shantanu Chowdhury, Manjula Kalia, Sudhanshu Vrati
Stringent regulation of antiviral signaling and cellular autophagy is critical for the host response to virus infection. However, little is known how these cellular processes are regulated in the absence of type I interferon signaling. Here, we show that ATF3 is induced following Japanese encephalitis virus (JEV) infection, and regulates cellular antiviral and autophagy pathways in the absence of type I interferons in mouse neuronal cells. We have identified new targets of ATF3 and show that it binds to the promoter regions of Stat1, Irf9, Isg15 and Atg5 thereby inhibiting cellular antiviral signaling and autophagy...
August 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28815404/neurological-presentation-of-zika-virus-infection-beyond-the-perinatal-period
#10
REVIEW
Thomas De Broucker, Alexandra Mailles, Jean-Paul Stahl
PURPOSE OF REVIEW: Our purpose was to summarize the current knowledge about the neurological presentation of Zika virus infection after the perinatal period. Other Flaviviruses infections, such as West Nile virus (WNV) or Japanese encephalitis virus (JEV), can result in neuro-invasive disease such as myelitis, encephalitis, or meningitis. We aimed at describing the specificities of ZV neurological infection. RECENT FINDINGS: The recent outbreaks demonstrated clearly the neurotropism of ZV...
August 16, 2017: Current Infectious Disease Reports
https://www.readbyqxmd.com/read/28814523/screening-of-fda-approved-drugs-for-inhibitors-against-japanese-encephalitis-virus-infection
#11
Shaobo Wang, Yang Liu, Jiao Guo, Peilin Wang, Leike Zhang, Gengfu Xiao, Wei Wang
Japanese encephalitis virus (JEV), an arthropod-borne flavivirus, is a major cause of acute viral encephalitis in humans. There is no approved drug available for JEV-specific treatment, and the vaccines are not effective against all clinical JEV isolates. Herein, a high-throughput screening was performed against JEV from an FDA-approved drug library. Five hit drugs were identified that inhibited JEV infection with a selective index > 10. Antiviral activities of these five hit drugs against other flavivirus, including Zika virus, were also validated...
August 16, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28791613/oleic-acid-enhances-dengue-virus-but-not-dengue-virus-like-particle-production-from-mammalian-cells
#12
Suwipa Ramphan, Sathiporn Suksathan, Nitwara Wikan, Puey Ounjai, Kanpong Boonthaworn, Poramate Rimthong, Tapanee Kanjanapruthipong, Suchin Worawichawong, Anan Jongkaewwattana, Nuttaporn Wongsiriroj, Duncan R Smith
Despite the recent introduction of a commercial vaccine, the mosquito-transmitted dengue virus is still a worldwide public health problem. Based on the live attenuated vaccine strategy, the commercial vaccine has a less than optimal protective profile. Virus-like particles (VLPs) offer an attractive alternate vaccination strategy due to the effectively native presentation of epitopes in the absence of any infectious genetic material. However, the production of amounts of VLP in a platform that can support commercial development remains a major obstacle...
August 8, 2017: Molecular Biotechnology
https://www.readbyqxmd.com/read/28770248/expression-of-domain-iii-of-the-envelope-protein-from-gp-78-a-japanese-encephalitis-virus
#13
Sahil Kulkarni, Sandeepan Mukherjee, Krishna Mohan Padmanabha Das, Kaushiki Prabhudesai, Nupur Deshpande, Sushant Karnik, Abhay S Chowdhary, Usha Padmanabhan
Acute encephalitis caused by the Japanese encephalitis virus (JEV) represents a growing epidemic and is a cause for concern in Southeast Asia. JEV is transmitted to humans through the bite of the Culicine mosquito species. The virus genome comprising of an RNA strand also encodes the envelope protein (E) which surrounds the virus. The E protein aids in fusion of virus with the cellular membrane of the host cell with the help of three structurally distinct domains (DI, DII, DIII) that are connected by flexible hinge regions...
June 2017: Virusdisease
https://www.readbyqxmd.com/read/28748833/identification-and-characterization-of-differentially-expressed-genes-from-human-microglial-cell-samples-infected-with-japanese-encephalitis-virus
#14
Manoj Kumar Gupta, Santosh Kumar Behera, Budheswar Dehury, Namita Mahapatra
BACKGROUND & OBJECTIVES: Limited studies have been reported on Japanese encephalitis (JE) with reference to microarray data analysis. The present study involved an in silico approach for identification and characterization of differentially expressed genes in human microglial cell (CHME3) samples, infected with P20778 strain of Japanese encephalitis virus (JEV). METHODS: Gene expression data (GSE57330) belonging to mRNA expression profile of CHME3 cells infected with JEV, was downloaded from the gene expression omnibus (GEO) database, processed and normalized by robust multichip averaging (RMA) method using affy packages of R...
April 2017: Journal of Vector Borne Diseases
https://www.readbyqxmd.com/read/28740748/a-highly-pathogenic-porcine-reproductive-and-respiratory-syndrome-virus-candidate-vaccine-based-on-japanese-encephalitis-virus-replicon-system
#15
Pingsheng Hu, Xiaoming Chen, Lihong Huang, Shukai Liu, Fuyu Zang, Jinchao Xing, Youyue Zhang, Jiaqi Liang, Guihong Zhang, Ming Liao, Wenbao Qi
In the swine industry, porcine reproductive and respiratory syndrome (PRRS) is a highly contagious disease which causes heavy economic losses worldwide. Effective prevention and disease control is an important issue. In this study, we described the construction of a Japanese encephalitis virus (JEV) DNA-based replicon with a cytomegalovirus (CMV) promoter based on the genome of Japanese encephalitis live vaccine virus SA14-14-2, which is capable of offering a potentially novel way to develop and produce vaccines against a major pathogen of global health...
2017: PeerJ
https://www.readbyqxmd.com/read/28728201/-fever-and-headache-after-a-vacation-in-thailand
#16
Benedikt Schwermer, Daniel Eschle, Constantine Bloch-Infanger
History 50 year-old man with fever and headache starting one week after returning from his vacation in Thailand. His general practitioner prescribed amoxicillin/clavulanic acid, without further analyses to pinpoint the infection. Examinations The examination of cerebro-spinal fluid was crucial for the final diagnosis. Lumbar puncture demonstrated a predominantly mononuclear pleocytosis of 80 cells/µl (< 5) with an elevated protein of 782 mg/l (< 450); glucose and lactate were within normal limits...
July 2017: Deutsche Medizinische Wochenschrift
https://www.readbyqxmd.com/read/28724764/rab5-and-rab11-are-required-for-clathrin-dependent-endocytosis-of-japanese-encephalitis-virus-in-bhk-21-cells
#17
Chun-Chun Liu, Yun-Na Zhang, Zhao-Yao Li, Jin-Xiu Hou, Jing Zhou, Lin Kan, Bin Zhou, Pu-Yan Chen
During infection Japanese Encephalitis Virus generally enters host cells via receptor-mediated clathrin dependent endocytosis. The trafficking of JEV within endosomes is controlled by Rab GTPases, but which Rab proteins are involved in JEV entry into BHK-21 cells is unknown. In this study, entry and post-internalization of JEV were analyzed using biochemical inhibitors, RNA interference and dominant negative mutants. Our data demonstrate that JEV entry into BHK-21 cells depends on clathrin, dynamin, and cholesterol, but not caveolae or macropinocytosis...
July 19, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28710958/japanese-encephalitis-virus-counteracts-bst2-restriction-via-its-envelope-protein-e
#18
Mei Li, Ping Wang, Zifeng Zheng, Kai Hu, Mudan Zhang, Xinmeng Guan, Ming Fu, Di Zhang, Wei Wang, Gengfu Xiao, Qinxue Hu, Yalan Liu
It has been well documented that BST2 restricts the release of enveloped viruses by cross-linking newly produced virions to the cell membrane. However, it is less clear whether and how BST2 inhibits the release of enveloped viruses which bud via the secretory pathway. Here, we demonstrated that BST2 restricts the release of Japanese encephalitis virus (JEV) whose budding occurs at the ER-Golgi intermediate compartment, and in turn, JEV infection downregulates BST2 expression. We further found that the JEV envelope protein E, but not other viral components, significantly downregulates BST2 with the viral protein M playing an auxiliary role in the process...
October 2017: Virology
https://www.readbyqxmd.com/read/28705180/etiology-and-prognosis-of-acute-viral-encephalitis-and-meningitis-in-chinese-children-a-multicentre-prospective-study
#19
Junhong Ai, Zhengde Xie, Gang Liu, Zongbo Chen, Yong Yang, Yuning Li, Jing Chen, Guo Zheng, Kunling Shen
BACKGROUND: In China, there were few studies about the pathogens of acute viral encephalitis and meningitis in children in recent years. The aims of this study were to characterize the etiology and prognosis of acute viral encephalitis and meningitis in Chinese children. METHODS: This was a multicentre prospective study. Two hundred and sixty one viral encephalitis patients and 285 viral meningitis patients were enrolled. The mean age of viral encephalitis and meningitis were 5...
July 14, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/28693301/serological-and-molecular-epidemiology-of-japanese-encephalitis-virus-infections-in-swine-herds-in-china-2006-2012
#20
Chunxia Chai, Qiao Wang, Sanjie Cao, Qin Zhao, Yiping Wen, Xiaobo Huang, Xintian Wen, Qiguai Yan, Xiaoping Ma, Rui Wu
Japanese encephalitis virus (JEV) is a mosquito-borne, zoonotic flavivirus causing viral encephalitis in humans and reproductive disorder in pig. JEV is widely prevalent throughout China in human, however, studies on JEV spatiotemporal analysis in Chinese swine herds have not been explored. Here, we present our serological and molecular epidemiological findings of the prevalence of JEV infections among swine herds in China, which suggest that JEV infections are extensively widespread and genotype I and III strains co-exist...
July 10, 2017: Journal of Veterinary Science
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